JB is a 32-year-old female who presents to the emergency department complaining of slight confusion and shortness of breath. She has a history of asthma and diabetes. She has a respiratory rate 36, temperature 97.8o F. SpO2 is 99% on room air. She appears to be slightly confused and has rapid and deep respirations. She is not coughing.
Use the Auscultation and Blood Pressure tabs to capture heart rate, blood pressure and lung sounds.
Which of the following would be the best diagnostic test to perform at this time?